!7

lib 1006985 // JAAD for AAC decoding

import net.sourceforge.jaad.mp4.*;
import net.sourceforge.jaad.mp4.api.*;
import net.sourceforge.jaad.mp4.api.Frame;
import net.sourceforge.jaad.aac.*;

p {
  File file = getProgramFile(#1006739, "Prince - Motherless Child - Live!-99Q31nyH16w.m4a");
  assertTrue("Please run #1006739", file.exists());
  
  fixContextClassLoader();
  MP4Container container = new MP4Container(new RandomAccessFile(file, "r"));
  Movie movie = container.getMovie();
  List<Track> tracks = movie.getTracks(AudioTrack.AudioCodec.AAC);
  if (tracks.size() > 0) {
    Track track = tracks.get(0);
    
    byte[] decoderSpecificInfo = track.getDecoderSpecificInfo();
    Decoder dec = new Decoder(decoderSpecificInfo);
    
    new SampleBuffer buf;
    Frame frame;
    while not null (frame = track.readNextFrame()) {
      dec.decodeFrame(frame.getData(), buf);
      byte[] audio = buf.getData();
      print("Got audio: " + l(audio) + " channels: " + buf.getChannels() + " bits/sample: " + buf.getBitsPerSample() + " " + (buf.isBigEndian() ? "big endian" : "little endian") + ", " + buf.getSampleRate() + " hz");
    }
  }
  print("Got " + n(tracks, "tracks"));
}

Began life as a copy of #1006984